package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_CODE_KEY;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Autowired
    StringRedisTemplate redisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {

        //验证时手机号合法性
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //生成验证码
        String code = RandomUtil.randomNumbers(6);
        //将验证码存入redis
        redisTemplate.opsForValue().set(LOGIN_CODE_KEY,code,2,TimeUnit.MINUTES);
        //模拟发送
        log.info("发送验证码成功:{}",code);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //验证手机号格式
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())) {
            return Result.fail("手机号格式错误");
        }
        //验证验证码
       String redisCode = redisTemplate.opsForValue().get(LOGIN_CODE_KEY);
        String code = loginForm.getCode();
        if(code == null || !redisCode.equals(code)){
            return Result.fail("验证码错误");
        }
        //查询用户是否存在
        User user = query().eq("phone", loginForm.getPhone()).one();
        if(ObjectUtil.isEmpty(user)){
            //创建新用户
            user = new User();
            user.setPhone(loginForm.getPhone());
            user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(6));
            save(user);

        }
        //存入redis hash类型
        //1.随机生成token作为登录令牌
        String token = UUID.randomUUID().toString(true);

        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);

        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(getResolvableType().hasGenerics())
                        .setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        redisTemplate.opsForHash().putAll(LOGIN_USER_KEY + token,userMap);
        //设置过期时间
        redisTemplate.expire(LOGIN_USER_KEY+token,30,TimeUnit.MINUTES);
        return Result.ok(token);
    }
}
